Patch series

do not touch src/revisioninfo.h
This is not needed in Debian builds, as the Git tree is not available during
build, resulting in an empty git hash being put in src/revisioninfo.h.
Even if building out of a packaging git clone, the Git tree is not the
upstream one, leading to confusion.
Instead, we just keep the src/revisioninfo.h file as shipped upstream (or
created by debian/pack-upstream-snapshot.sh for snapshots).